I think Don Juans should place themselves above Facebook.
The whole experience is very immature and too "highschool". It is just a way to feel socially accepted. "Everyone is doing it so I should too." All the guys who say they have an account but never use it - why bother? Just get rid of it, if it is serving you no other purpose than to be part of the "group".
Picture in your mind the Don Juan you are aspiring to be. The guy who has ALL his shyt together. The guy who has women lining up when he's around and dreaming about him when he's not. The guy who has all the options in the world. This guy is cool, fun and awesome. His life is full of amazing experiences and he can date women any time he wants.
Do you think guys like this are wasting their lives looking at Facebook? No way ! There is not enough time and too many other great things to be doing. While you are d!cking aorund on Facebook these guys are out there dating and fvcking hot women or doing things far more interesting.
Next time a chick asks you if you are on Facebook, roll your eyes, chuckle and shake your head no. Amused mastery. Treat her as if she's an immature child and you are way too cool for silly stuff like Facebook.